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Widespread scab reported as UK potato harvest progresses

As the potato harvest in the United Kingdom progresses, there are increasing reports of widespread scab. The weather in the United Kingdom was mixed last week, with some cooler temperatures but also warm and muggy at times. Rain showers have been sporadic and widespread. In the East, good and often above average yields have been reported for the region with lifting ahead of previous years. Lifting of early varieties is underway and…

Hybrid breeding technology protects potato from fungus

In a hidden experimental field in Wageningen, the Netherlands, surrounded by tall maize plants, there are several smaller plots with potato plants. In some of these plots there are only dead plants, in others the plants have been affected by late blight (Phytophthora infestans) to a greater or lesser extent, but there are also fields with only perfectly healthy potatoes. The latter are the result of the latest crosses by the Wageningen…

Fast-Tracking Extreme Resistance

A key tool in the arsenal for controlling potato virus Y (PVY) is cultivar resistance. Now, researchers are developing better molecular markers for faster, more accurate screening of potato breeding lines for “extreme resistance” to PVY – equivalent to PVY immunity. That will enable breeders to more efficiently develop new varieties with total protection against this serious disease. “PVY is one of the most widespread viruses and also one of the most…

Dutch company develops new blight-resistant potato

The Dutch company Solynta has developed a potato variety that is resistant to late blight (Phytophthora infestans). As a result, it could greatly reduce the use of pesticides in agriculture. The company plans to unveil its new blight-resistant potato later this week. The potato disease causes widespread damage to potato stocks worldwide every year, despite the intensive use of pesticides. Richard Visser, chair and head plant breeding at Wageningen University & Research,…

Scottish Potato Industry Unites to Fund Major Blackleg Research Project

A group of major potato businesses and public sector organizations, including the Scottish government and AHDB, is sponsoring a £242,000 (USD 313,000) research project aimed at reducing the impact of potato disease blackleg on the Scottish seed potato industry. AHDB and the Scottish government joint-funded a project during 2013-2016 which provided significant new information on blackleg and its origins. It also highlighted areas where further investigation is required for improved management of…

Ongoing monitoring program finds potato psyllids

University of Lethbridge biogeography professor Dr. Dan Johnson and his team have been monitoring Prairie potato fields for the past few years, looking for evidence of the potato psyllid insect and a bacterium it can carry that can lead to zebra chip disease in potato crops. So far in 2017, the number of potato psyllids has been lower than in previous years. U.S. researchers and research news also report lower numbers this…

Late blight confirmed in Manitoba

Late blight has been confirmed in Manitoba in the rural municipality of Norfolk Treherne, the south central potato growing region in the province. The region had heavy rains last week in the area. Leaf spot infections appear to be scattered close to the irrigation pivot. The infected leaf spots have sporulation and there are a few infected stems as well. Samples are being inspected for strain identification. According to Vikram Bisht, plant…

Late Blight and Potato Psyllids Both Detected in North Dakota

North Dakota State University (NDSU) plant pathologist Dr. Gary Secor announced July 27 that late blight was confirmed in a potato sample from Pembina County in northeast North Dakota. Since then it has been determined the outbreak is more widespread with finds in Walsh and Nelson Counties as well. Conditions have been favourable for late blight spread and infection, and growers in these areas should apply a late blight specialty fungicide such…

Protecting Your Stored Investment

The vast majority of potato producers have a good to excellent understanding of storage management guidelines. Still, every winter an unfortunate high number of producers face unnecessary stored tuber losses due to incorrect temperature and moisture management. For now, the best scientists are able to offer are strong and repeated reminders about the importance of managing one’s storage conditions. In the longer term, however, research may point toward ways to minimize and…

Late blight found in Ontario spore traps

Late blight was found yesterday (July 19) in the Delhi area, in a field with two spore traps.  There were only a few plants with dried up lesions. According to the grower, he had sprayed Curzate + Bravo + Copper as a preventative treatment. This week, spore traps caught late blight spores in the Shelburne, Alliston and Simcoe Delhi areas. It has been a very wet year so far, and it is…

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